Lightning Minerals Defines Two New Gold Targets Across 5km Western Zone Corridor
Key Takeaways
- Lightning Minerals has defined two distinct gold targets within a new 5km Western Zone corridor at Mt Turner — a 1km continuous IRGS-style gold anomaly in the north and four parallel epithermal-style gold trends in the south — from 551 soil samples collected in July 2026.
- The northern target's gold anomaly sits at the thermal transition zone of a 1,400m multi-element hydrothermal footprint reaching 140m wide, the textbook location for gold enrichment in intrusion-related gold systems, and both anomalies remain open.
- The southern target returned peak soil assays of 330 ppb Au and a 2026 rock chip of 1.19 g/t Au, 38.80 g/t Ag, and 5,540 ppm As from mineralised rhyolite dykes, with historical rock chips including values up to 15.35 g/t Au.
- The Western Zone is now a second major exploration corridor at Mt Turner alongside the 14km Drummer Fault, with multiple independent datasets — soil geochemistry, rock chips, field observations, and structural mapping — converging on the same target areas.
- The next phase involves ~100 additional soil samples, five bedrock trenches at 200m spacing, and systematic rock chip traverses, all staged before drill spend, with targets currently conceptual and no mineral deposit yet confirmed.
Two new gold targets defined in Lightning Minerals’ Western Zone
Interpretation of results from the recently completed Western Zone soil geochemistry program has defined two compelling gold target areas at Lightning Minerals‘ wholly owned Mt Turner Project in northern Queensland. The program collected 551 soil samples across a 5km Western Zone corridor in July 2026, converting what was previously a conceptual structural idea into a priority, multi-target exploration corridor.
The two targets, a large northern zone and a southern epithermal-style zone, now establish the Western Zone as a second major gold-bearing structural corridor at Mt Turner, alongside the existing 14km Drummer Fault where the company has already achieved initial drilling success. Multiple independent datasets, including soil geochemistry, rock chips, and structural mapping, are now converging on the same target areas.
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Breaking down the two targets
Northern target — a 1km gold anomaly with a 1.4km hydrothermal footprint
The northern target is defined by a continuous >20 ppb Au anomaly extending approximately 1,000m along strike and ranging from 20m to 80m wide. This gold anomaly sits along the western edge of a broader 1,400m multi-element thermal vector anomaly (Cu×Bi/As >100) that reaches up to 140m wide, interpreted as the hydrothermal footprint of a potential intrusion-related gold system (IRGS).
Importantly, neither anomaly is fully closed. The gold anomaly remains open to the south, and the thermal vector anomaly remains open to the east, meaning the target has real potential to expand. Supporting field evidence strengthens the interpretation: gossanous breccia float and a narrow siliceous gossan containing bismutite and cuprite have been identified within the anomalous corridor, consistent with higher-temperature feeder structures at depth. This is a preliminary interpretation and requires confirmation through additional surface sampling, trenching, and drilling.
| Attribute | Western Zone North | Western Zone South |
|---|---|---|
| Target style | Zoned, intrusion-related hydrothermal / IRGS-style system | Rhyolite-associated, lower-temperature epithermal-style system |
| Surface gold expression | Continuous >20 ppb Au anomaly over approximately 1,000m; 20–80m wide | Four sub-parallel >20 ppb Au trends, each approximately 200–300m long and up to 40m wide |
| Peak soil gold | Continuous anomaly is the principal feature; individual maximum not stated in source report | 330 ppb Au (sample 106663) |
| Key pathfinders | Bi-Cu thermal vector with transitional As and distal Pb-Zn zonation | Au-Ag-As-Sb association; comparatively low Cu and Bi |
| Priority follow-up | Extension soils, five bedrock trenches, structural measurements and initial drill design | Systematic rock-chip traverses followed by trenching where continuity is confirmed |
Southern target — four parallel epithermal-style gold trends
The southern target presents a distinctly different character. Four sub-parallel, north-trending gold zones have been delineated, each extending 200–300m along strike and up to 40m wide. Soil assays peak at 330 ppb Au (sample 106663), and the gold anomalism is closely associated with altered, brecciated, and mineralised rhyolite dykes.
A 2026 rock chip sample (#106064) of silicified and brecciated rhyolite returned 1.19 g/t Au, 38.80 g/t Ag, 5,540 ppm As, 1.32% Pb and 903 ppm Sb. Historical reconnaissance rock chips collected between 2019 and 2022 include individual values up to 15.35 g/t Au, 198 g/t Ag and 22% Cu. It is important to note that both current and historical rock chip samples are selective grab samples and are not representative of average grade, continuity, or mineralised width. Systematic surface sampling is required to determine whether the mineralisation has sufficient continuity and tenor to justify drill testing.
What is an intrusion-related gold system, and why does it matter here?
To understand why the northern target is drawing attention, it helps to know what an intrusion-related gold system (IRGS) is. When magma intrudes into the crust, it carries hot, metal-rich fluids with it. These fluids move outward and cool as they travel away from the heat source, depositing different metals at different temperatures along the way. This creates a predictable zoning pattern that geologists can read at surface.
The Cu×Bi/As ratio that Lightning’s team is mapping is called a thermal vector. Copper and bismuth tend to concentrate close to the hot core of the system, while arsenic, lead, and zinc appear further out in the cooler, more distal zones. When geologists see this ratio exceed 100, they interpret it as a signature of that hotter, proximal environment.
Here is the key insight: gold in IRGS-style systems tends to concentrate not at the hottest core, but at the thermal transition zone between the hot core and the cooler margins. That is precisely where the northern target’s >20 ppb Au contour is positioned at Mt Turner, sitting along the western flank of the high-temperature vector anomaly where it overlaps with an arsenic response. That positioning is what makes this a priority target.
The southern target tells a different story. Its Au-Ag-As-Sb metal association with low copper and bismuth is characteristic of a lower-temperature, epithermal-style environment, suggesting mineralisation formed at a shallower crustal level than the northern zone. Two distinct systems, different depths, different styles, and both defined within the same 5km corridor.
MD’s perspective and the path to drilling
Troy Brice, Managing Director
“These results represent an important step forward in our systematic evaluation of the broader Mt Turner Gold and Copper Project, defining two significant gold target areas within the five-kilometre Western Zone corridor. The scale and coherence of the northern target is particularly encouraging, with a continuous one-kilometre gold anomaly adjacent to a larger 1.4-kilometre multi-element interpreted hydrothermal footprint, additionally, multiple, parallel, gold anomalies have been defined in the south. These results are supported by highly anomalous rock chip results, importantly, the gold anomaly and hydrothermal footprint target in the north remain open. The Western Zone provides Lightning with another major gold exploration opportunity alongside the 14-kilometre-long Drummer Fault target and further strengthens our view of the broader district scale potential at Mt Turner. Our next phase of work will focus on extending and refining these anomalies through targeted soil and rock chip sampling and trenching, with the objective of defining priority targets for initial drill testing. With multiple gold targets now emerging across Mt Turner, we are excited by the opportunity ahead and look forward to systematically advancing the Project.”
The staged follow-up program the company proposes is designed to validate the surface response and build toward drill-ready targets:
- Complete approximately 100 additional soil samples to refine the northern thermal vector anomaly to the east and the gold anomaly to the south.
- Excavate five trenches to bedrock across the northern >20 ppb Au trend at approximately 200m spacing, subject to access, heritage, environmental and regulatory approvals.
- Use trench exposures to test bedrock gold tenor and continuity, obtain structural measurements, and refine initial drill-hole orientations.
- Undertake systematic rock chip sampling along the southern gold trends and exposed mineralised rhyolite dykes.
- Progress priority southern anomalies toward trenching if surface sampling confirms continuity and tenor.
- Integrate Western Zone results with LiDAR, mapping, historical datasets, and the broader Mt Turner structural model to rank the new targets against the district-wide target pipeline.
This is a capital-efficient, staged approach: surface work is being completed before committing to drill spend. What makes it credible is that multiple independent datasets (soil geochemistry, rock chips, field observations, and structural mapping) are now pointing at the same target areas rather than any single line of evidence carrying the interpretation alone. It is important to note that references to target scale and the hydrothermal footprint are conceptual. There has been insufficient exploration to determine whether a mineral deposit is present, and no assessment of reasonable prospects for eventual economic extraction has been completed. Drill targets are the objective of the follow-up program, not the current status.
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Mt Turner’s growing district-scale footprint
The Western Zone results add meaningful breadth to what Lightning Minerals is building at Mt Turner. The project is interpreted as a large “Back Arc Copper Gold Porphyry” system overprinted by multiple structural events, with four major structural orientations identified across the district from LiDAR, dyke distribution, and field mapping.
The Western Zone is now a confirmed second major structural corridor at Mt Turner, sitting alongside the 14km Drummer Fault that has been the focus of the company’s initial drilling program. With two distinct exploration corridors now active and multiple target styles identified across the project, the company is systematically advancing toward resource definition across a genuinely district-scale gold system in northern Queensland. Lightning Minerals holds the Mt Turner Project 100% wholly owned.
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